如何防止fragment出现重叠的状况

首先第一步是:在布局

<FrameLayout
        android:id="@+id/fragelayout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"></FrameLayout>

<RadioGroup
    android:id="@+id/radiogroup"
    android:gravity="center"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <RadioButton
        android:id="@+id/wuye"
        android:button="@null"
        android:text="物业"
        android:textColor="@color/text_color"
        android:checked="true"
        android:gravity="center"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_margin="5dp"
        android:layout_height="wrap_content"
        android:drawableTop="@drawable/wuye"
        />
    <RadioButton
        android:id="@+id/supmarts"
        android:button="@null"
        android:text="超市"
        android:textColor="@color/text_color"
        android:gravity="center"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_margin="5dp"
        android:layout_height="wrap_content"
        android:drawableTop="@drawable/supmar"
        />
    <RadioButton
        android:id="@+id/tanchu"
        android:button="@null"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="match_parent"
        android:background="@mipmap/open"
        />
    <RadioButton
        android:id="@+id/sq"
        android:button="@null"
        android:text="商圈"
        android:textColor="@color/text_color"
        android:gravity="center"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_margin="5dp"
        android:layout_height="wrap_content"
        android:drawableTop="@drawable/sq"
        />

    <RadioButton
        android:id="@+id/mine"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:layout_weight="1"
        android:button="@null"
        android:textColor="@color/text_color"
        android:drawableTop="@drawable/mine"
        android:gravity="center"
        android:text="我的" />
</RadioGroup>

第二步：在base里添加setparams

public abstract class BaseFragment extends Fragment {
   private Bundle params;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(getLayoutId(), container, false);
        initView(view);
        initData();

        return view;
    }

    protected  abstract  int getLayoutId();
    protected abstract void initView(View view);
    protected  abstract  void initData();
    public Bundle getParams(){
        return params;
    }
    public  void setParams (Bundle params){
        this.params=params;
    }

}

public abstract class BaseActivity extends AppCompatActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            getWindow().setStatusBarColor(0xff24cf5f);
        }
        setContentView(getLayout());
        initView();
        initDate();

    }
    protected abstract int getLayout();
    protected abstract void initView();
    protected abstract void initDate();
}

第三步：在activity中

public class MainActivity extends BaseActivity {
       private RadioGroup radiogroup;

    private FragmentManager manager;
    public Map<String, Integer> fragments = new HashMap<>();
    public Map<Integer, BaseFragment> lastFragments = new HashMap<>();
    private BaseFragment lastFragment;
    private BaseFragment currentFragment;

    public void changFragment(int containerId, Class<? extends BaseFragment> fragmentClass, Bundle bundle, boolean isReplace, boolean isBack) {
        String fragmentName = fragmentClass.getSimpleName();
        manager = getSupportFragmentManager();
        FragmentTransaction transaction = manager.beginTransaction();
        currentFragment = (BaseFragment) manager.findFragmentByTag(fragmentName);
        if (currentFragment == null) {
            try {
                currentFragment = fragmentClass.newInstance();
                transaction.add(containerId, currentFragment, fragmentName);
                fragments.put(fragmentName, containerId);
            } catch (InstantiationException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
        if (isReplace) {
            if (lastFragments.size() > 0) {
                lastFragment = lastFragments.get(containerId);
                if (lastFragment != null) {
                    fragments.remove(lastFragment);
                }
            }
            transaction.replace(containerId, currentFragment, fragmentName);
        } else {
            if (lastFragments.size() > 0) {
                lastFragment = lastFragments.get(containerId);
                if (lastFragment != null) {
                    transaction.hide(lastFragment);
                }
            }
            transaction.show(currentFragment);
        }
        if (bundle != null) {
            currentFragment.setParams(bundle);
        }
        if (isBack) {
            transaction.addToBackStack(fragmentName);
        }
        transaction.commit();
        lastFragments.put(containerId, currentFragment);
    }

    @Override
    protected void initDate() {

        radiogroup.check(R.id.supmarts);
        changFragment(R.id.fragelayout, SupmartFragment.class, null, false, false);
        radiogroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                switch (checkedId) {
                    case R.id.wuye:
                        changFragment(R.id.fragelayout, WYFragment.class, null, false, false);
                        break;
                    case R.id.supmarts:
                        changFragment(R.id.fragelayout, SupmartFragment.class, null, false, false);
                        break;
                    case R.id.tanchu:
                        break;
                    case R.id.sq:
                        changFragment(R.id.fragelayout, SQFragment.class, null, false, false);
                        break;
                    case R.id.mine:
                        changFragment(R.id.fragelayout, MineFragment1.class, null, false, false);
                        break;
                }
            }
        });

    }

    @Override
    protected int getLayout() {
        return R.layout.activity_main;
    }

    @Override
    protected void initView() {
        radiogroup = findViewById(R.id.radiogroup);
    }


}